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ccb1352e | 1 | /* |
03f0d916 | 2 | * Copyright (c) 2007-2013 Nicira, Inc. |
ccb1352e JG |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
17 | */ | |
18 | ||
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
20 | ||
21 | #include <linux/init.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/if_arp.h> | |
24 | #include <linux/if_vlan.h> | |
25 | #include <linux/in.h> | |
26 | #include <linux/ip.h> | |
27 | #include <linux/jhash.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/time.h> | |
30 | #include <linux/etherdevice.h> | |
31 | #include <linux/genetlink.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/kthread.h> | |
34 | #include <linux/mutex.h> | |
35 | #include <linux/percpu.h> | |
36 | #include <linux/rcupdate.h> | |
37 | #include <linux/tcp.h> | |
38 | #include <linux/udp.h> | |
ccb1352e JG |
39 | #include <linux/ethtool.h> |
40 | #include <linux/wait.h> | |
ccb1352e JG |
41 | #include <asm/div64.h> |
42 | #include <linux/highmem.h> | |
43 | #include <linux/netfilter_bridge.h> | |
44 | #include <linux/netfilter_ipv4.h> | |
45 | #include <linux/inetdevice.h> | |
46 | #include <linux/list.h> | |
8e4e1713 | 47 | #include <linux/lockdep.h> |
ccb1352e JG |
48 | #include <linux/openvswitch.h> |
49 | #include <linux/rculist.h> | |
50 | #include <linux/dmi.h> | |
51 | #include <linux/workqueue.h> | |
52 | #include <net/genetlink.h> | |
46df7b81 PS |
53 | #include <net/net_namespace.h> |
54 | #include <net/netns/generic.h> | |
ccb1352e JG |
55 | |
56 | #include "datapath.h" | |
57 | #include "flow.h" | |
e80857cc | 58 | #include "flow_table.h" |
e6445719 | 59 | #include "flow_netlink.h" |
ccb1352e | 60 | #include "vport-internal_dev.h" |
cff63a52 | 61 | #include "vport-netdev.h" |
ccb1352e | 62 | |
8e4e1713 PS |
63 | int ovs_net_id __read_mostly; |
64 | ||
fb5d1e9e JR |
65 | /* Check if need to build a reply message. |
66 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ | |
67 | static bool ovs_must_notify(struct genl_info *info, | |
68 | const struct genl_multicast_group *grp) | |
69 | { | |
70 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
71 | netlink_has_listeners(genl_info_net(info)->genl_sock, 0); | |
72 | } | |
73 | ||
68eb5503 | 74 | static void ovs_notify(struct genl_family *family, |
2a94fe48 | 75 | struct sk_buff *skb, struct genl_info *info) |
ed661185 | 76 | { |
68eb5503 | 77 | genl_notify(family, skb, genl_info_net(info), info->snd_portid, |
2a94fe48 | 78 | 0, info->nlhdr, GFP_KERNEL); |
ed661185 TG |
79 | } |
80 | ||
ccb1352e JG |
81 | /** |
82 | * DOC: Locking: | |
83 | * | |
8e4e1713 PS |
84 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
85 | * operations on vports, etc.), Writes to other state (flow table | |
86 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
87 | * by ovs_lock. | |
ccb1352e JG |
88 | * |
89 | * Reads are protected by RCU. | |
90 | * | |
91 | * There are a few special cases (mostly stats) that have their own | |
92 | * synchronization but they nest under all of above and don't interact with | |
93 | * each other. | |
8e4e1713 PS |
94 | * |
95 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
96 | */ |
97 | ||
8e4e1713 PS |
98 | static DEFINE_MUTEX(ovs_mutex); |
99 | ||
100 | void ovs_lock(void) | |
101 | { | |
102 | mutex_lock(&ovs_mutex); | |
103 | } | |
104 | ||
105 | void ovs_unlock(void) | |
106 | { | |
107 | mutex_unlock(&ovs_mutex); | |
108 | } | |
109 | ||
110 | #ifdef CONFIG_LOCKDEP | |
111 | int lockdep_ovsl_is_held(void) | |
112 | { | |
113 | if (debug_locks) | |
114 | return lockdep_is_held(&ovs_mutex); | |
115 | else | |
116 | return 1; | |
117 | } | |
118 | #endif | |
119 | ||
ccb1352e | 120 | static struct vport *new_vport(const struct vport_parms *); |
8055a89c | 121 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
ccb1352e | 122 | const struct dp_upcall_info *); |
8055a89c | 123 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
ccb1352e JG |
124 | const struct dp_upcall_info *); |
125 | ||
8e4e1713 | 126 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 127 | static struct datapath *get_dp(struct net *net, int dp_ifindex) |
ccb1352e JG |
128 | { |
129 | struct datapath *dp = NULL; | |
130 | struct net_device *dev; | |
131 | ||
132 | rcu_read_lock(); | |
46df7b81 | 133 | dev = dev_get_by_index_rcu(net, dp_ifindex); |
ccb1352e JG |
134 | if (dev) { |
135 | struct vport *vport = ovs_internal_dev_get_vport(dev); | |
136 | if (vport) | |
137 | dp = vport->dp; | |
138 | } | |
139 | rcu_read_unlock(); | |
140 | ||
141 | return dp; | |
142 | } | |
143 | ||
8e4e1713 | 144 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
443cd88c | 145 | static const char *ovs_dp_name(const struct datapath *dp) |
ccb1352e | 146 | { |
8e4e1713 | 147 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
ccb1352e JG |
148 | return vport->ops->get_name(vport); |
149 | } | |
150 | ||
151 | static int get_dpifindex(struct datapath *dp) | |
152 | { | |
153 | struct vport *local; | |
154 | int ifindex; | |
155 | ||
156 | rcu_read_lock(); | |
157 | ||
15eac2a7 | 158 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 159 | if (local) |
cff63a52 | 160 | ifindex = netdev_vport_priv(local)->dev->ifindex; |
ccb1352e JG |
161 | else |
162 | ifindex = 0; | |
163 | ||
164 | rcu_read_unlock(); | |
165 | ||
166 | return ifindex; | |
167 | } | |
168 | ||
169 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
170 | { | |
171 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
172 | ||
ccb1352e | 173 | free_percpu(dp->stats_percpu); |
46df7b81 | 174 | release_net(ovs_dp_get_net(dp)); |
15eac2a7 | 175 | kfree(dp->ports); |
ccb1352e JG |
176 | kfree(dp); |
177 | } | |
178 | ||
15eac2a7 PS |
179 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
180 | u16 port_no) | |
181 | { | |
182 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
183 | } | |
184 | ||
bb6f9a70 | 185 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
186 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
187 | { | |
188 | struct vport *vport; | |
15eac2a7 PS |
189 | struct hlist_head *head; |
190 | ||
191 | head = vport_hash_bucket(dp, port_no); | |
b67bfe0d | 192 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
15eac2a7 PS |
193 | if (vport->port_no == port_no) |
194 | return vport; | |
195 | } | |
196 | return NULL; | |
197 | } | |
198 | ||
8e4e1713 | 199 | /* Called with ovs_mutex. */ |
ccb1352e JG |
200 | static struct vport *new_vport(const struct vport_parms *parms) |
201 | { | |
202 | struct vport *vport; | |
203 | ||
204 | vport = ovs_vport_add(parms); | |
205 | if (!IS_ERR(vport)) { | |
206 | struct datapath *dp = parms->dp; | |
15eac2a7 | 207 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 208 | |
15eac2a7 | 209 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 210 | } |
ccb1352e JG |
211 | return vport; |
212 | } | |
213 | ||
ccb1352e JG |
214 | void ovs_dp_detach_port(struct vport *p) |
215 | { | |
8e4e1713 | 216 | ASSERT_OVSL(); |
ccb1352e JG |
217 | |
218 | /* First drop references to device. */ | |
15eac2a7 | 219 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
220 | |
221 | /* Then destroy it. */ | |
222 | ovs_vport_del(p); | |
223 | } | |
224 | ||
225 | /* Must be called with rcu_read_lock. */ | |
226 | void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb) | |
227 | { | |
228 | struct datapath *dp = p->dp; | |
229 | struct sw_flow *flow; | |
230 | struct dp_stats_percpu *stats; | |
231 | struct sw_flow_key key; | |
232 | u64 *stats_counter; | |
1bd7116f | 233 | u32 n_mask_hit; |
ccb1352e | 234 | int error; |
ccb1352e | 235 | |
404f2f10 | 236 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e JG |
237 | |
238 | /* Extract flow from 'skb' into 'key'. */ | |
03f0d916 | 239 | error = ovs_flow_extract(skb, p->port_no, &key); |
ccb1352e JG |
240 | if (unlikely(error)) { |
241 | kfree_skb(skb); | |
242 | return; | |
243 | } | |
244 | ||
245 | /* Look up flow. */ | |
5bb50632 | 246 | flow = ovs_flow_tbl_lookup_stats(&dp->table, &key, &n_mask_hit); |
ccb1352e JG |
247 | if (unlikely(!flow)) { |
248 | struct dp_upcall_info upcall; | |
249 | ||
250 | upcall.cmd = OVS_PACKET_CMD_MISS; | |
251 | upcall.key = &key; | |
252 | upcall.userdata = NULL; | |
15e47304 | 253 | upcall.portid = p->upcall_portid; |
ccb1352e JG |
254 | ovs_dp_upcall(dp, skb, &upcall); |
255 | consume_skb(skb); | |
256 | stats_counter = &stats->n_missed; | |
257 | goto out; | |
258 | } | |
259 | ||
260 | OVS_CB(skb)->flow = flow; | |
03f0d916 | 261 | OVS_CB(skb)->pkt_key = &key; |
ccb1352e | 262 | |
e298e505 | 263 | ovs_flow_stats_update(OVS_CB(skb)->flow, skb); |
ccb1352e | 264 | ovs_execute_actions(dp, skb); |
e298e505 | 265 | stats_counter = &stats->n_hit; |
ccb1352e JG |
266 | |
267 | out: | |
268 | /* Update datapath statistics. */ | |
df9d9fdf | 269 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 270 | (*stats_counter)++; |
1bd7116f | 271 | stats->n_mask_hit += n_mask_hit; |
df9d9fdf | 272 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
273 | } |
274 | ||
275 | static struct genl_family dp_packet_genl_family = { | |
276 | .id = GENL_ID_GENERATE, | |
277 | .hdrsize = sizeof(struct ovs_header), | |
278 | .name = OVS_PACKET_FAMILY, | |
279 | .version = OVS_PACKET_VERSION, | |
46df7b81 | 280 | .maxattr = OVS_PACKET_ATTR_MAX, |
3a4e0d6a PS |
281 | .netnsok = true, |
282 | .parallel_ops = true, | |
ccb1352e JG |
283 | }; |
284 | ||
285 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, | |
46df7b81 | 286 | const struct dp_upcall_info *upcall_info) |
ccb1352e JG |
287 | { |
288 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
289 | int err; |
290 | ||
15e47304 | 291 | if (upcall_info->portid == 0) { |
ccb1352e JG |
292 | err = -ENOTCONN; |
293 | goto err; | |
294 | } | |
295 | ||
ccb1352e | 296 | if (!skb_is_gso(skb)) |
8055a89c | 297 | err = queue_userspace_packet(dp, skb, upcall_info); |
ccb1352e | 298 | else |
8055a89c | 299 | err = queue_gso_packets(dp, skb, upcall_info); |
ccb1352e JG |
300 | if (err) |
301 | goto err; | |
302 | ||
303 | return 0; | |
304 | ||
305 | err: | |
404f2f10 | 306 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 307 | |
df9d9fdf | 308 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 309 | stats->n_lost++; |
df9d9fdf | 310 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
311 | |
312 | return err; | |
313 | } | |
314 | ||
8055a89c | 315 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
ccb1352e JG |
316 | const struct dp_upcall_info *upcall_info) |
317 | { | |
a1b5d0dd | 318 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
ccb1352e JG |
319 | struct dp_upcall_info later_info; |
320 | struct sw_flow_key later_key; | |
321 | struct sk_buff *segs, *nskb; | |
322 | int err; | |
323 | ||
09c5e605 | 324 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
92e5dfc3 PS |
325 | if (IS_ERR(segs)) |
326 | return PTR_ERR(segs); | |
ccb1352e JG |
327 | |
328 | /* Queue all of the segments. */ | |
329 | skb = segs; | |
330 | do { | |
8055a89c | 331 | err = queue_userspace_packet(dp, skb, upcall_info); |
ccb1352e JG |
332 | if (err) |
333 | break; | |
334 | ||
a1b5d0dd | 335 | if (skb == segs && gso_type & SKB_GSO_UDP) { |
ccb1352e JG |
336 | /* The initial flow key extracted by ovs_flow_extract() |
337 | * in this case is for a first fragment, so we need to | |
338 | * properly mark later fragments. | |
339 | */ | |
340 | later_key = *upcall_info->key; | |
341 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
342 | ||
343 | later_info = *upcall_info; | |
344 | later_info.key = &later_key; | |
345 | upcall_info = &later_info; | |
346 | } | |
347 | } while ((skb = skb->next)); | |
348 | ||
349 | /* Free all of the segments. */ | |
350 | skb = segs; | |
351 | do { | |
352 | nskb = skb->next; | |
353 | if (err) | |
354 | kfree_skb(skb); | |
355 | else | |
356 | consume_skb(skb); | |
357 | } while ((skb = nskb)); | |
358 | return err; | |
359 | } | |
360 | ||
c3ff8cfe TG |
361 | static size_t key_attr_size(void) |
362 | { | |
363 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
7d5437c7 PS |
364 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ |
365 | + nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */ | |
366 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */ | |
367 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */ | |
368 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ | |
369 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
370 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
371 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
c3ff8cfe TG |
372 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ |
373 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
374 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ | |
375 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
376 | + nla_total_size(4) /* OVS_KEY_ATTR_8021Q */ | |
377 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
378 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
379 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
380 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
381 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
382 | } | |
383 | ||
bda56f14 TG |
384 | static size_t upcall_msg_size(const struct nlattr *userdata, |
385 | unsigned int hdrlen) | |
c3ff8cfe TG |
386 | { |
387 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
bda56f14 | 388 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
c3ff8cfe TG |
389 | + nla_total_size(key_attr_size()); /* OVS_PACKET_ATTR_KEY */ |
390 | ||
391 | /* OVS_PACKET_ATTR_USERDATA */ | |
392 | if (userdata) | |
393 | size += NLA_ALIGN(userdata->nla_len); | |
394 | ||
395 | return size; | |
396 | } | |
397 | ||
8055a89c | 398 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
ccb1352e JG |
399 | const struct dp_upcall_info *upcall_info) |
400 | { | |
401 | struct ovs_header *upcall; | |
402 | struct sk_buff *nskb = NULL; | |
403 | struct sk_buff *user_skb; /* to be queued to userspace */ | |
404 | struct nlattr *nla; | |
795449d8 | 405 | struct genl_info info = { |
8055a89c | 406 | .dst_sk = ovs_dp_get_net(dp)->genl_sock, |
795449d8 TG |
407 | .snd_portid = upcall_info->portid, |
408 | }; | |
409 | size_t len; | |
bda56f14 | 410 | unsigned int hlen; |
8055a89c TG |
411 | int err, dp_ifindex; |
412 | ||
413 | dp_ifindex = get_dpifindex(dp); | |
414 | if (!dp_ifindex) | |
415 | return -ENODEV; | |
ccb1352e JG |
416 | |
417 | if (vlan_tx_tag_present(skb)) { | |
418 | nskb = skb_clone(skb, GFP_ATOMIC); | |
419 | if (!nskb) | |
420 | return -ENOMEM; | |
421 | ||
86a9bad3 | 422 | nskb = __vlan_put_tag(nskb, nskb->vlan_proto, vlan_tx_tag_get(nskb)); |
8aa51d64 | 423 | if (!nskb) |
ccb1352e JG |
424 | return -ENOMEM; |
425 | ||
426 | nskb->vlan_tci = 0; | |
427 | skb = nskb; | |
428 | } | |
429 | ||
430 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
431 | err = -EFBIG; | |
432 | goto out; | |
433 | } | |
434 | ||
bda56f14 TG |
435 | /* Complete checksum if needed */ |
436 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
437 | (err = skb_checksum_help(skb))) | |
438 | goto out; | |
439 | ||
440 | /* Older versions of OVS user space enforce alignment of the last | |
441 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
442 | * padding logic. Only perform zerocopy if padding is not required. | |
443 | */ | |
444 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
445 | hlen = skb_zerocopy_headlen(skb); | |
446 | else | |
447 | hlen = skb->len; | |
448 | ||
449 | len = upcall_msg_size(upcall_info->userdata, hlen); | |
795449d8 | 450 | user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC); |
ccb1352e JG |
451 | if (!user_skb) { |
452 | err = -ENOMEM; | |
453 | goto out; | |
454 | } | |
455 | ||
456 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
457 | 0, upcall_info->cmd); | |
458 | upcall->dp_ifindex = dp_ifindex; | |
459 | ||
460 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); | |
e6445719 | 461 | ovs_nla_put_flow(upcall_info->key, upcall_info->key, user_skb); |
ccb1352e JG |
462 | nla_nest_end(user_skb, nla); |
463 | ||
464 | if (upcall_info->userdata) | |
4490108b BP |
465 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
466 | nla_len(upcall_info->userdata), | |
467 | nla_data(upcall_info->userdata)); | |
ccb1352e | 468 | |
bda56f14 TG |
469 | /* Only reserve room for attribute header, packet data is added |
470 | * in skb_zerocopy() */ | |
471 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
472 | err = -ENOBUFS; | |
473 | goto out; | |
474 | } | |
475 | nla->nla_len = nla_attr_size(skb->len); | |
ccb1352e | 476 | |
36d5fe6a ZK |
477 | err = skb_zerocopy(user_skb, skb, skb->len, hlen); |
478 | if (err) | |
479 | goto out; | |
ccb1352e | 480 | |
aea0bb4f TG |
481 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
482 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
483 | size_t plen = NLA_ALIGN(user_skb->len) - user_skb->len; | |
484 | ||
485 | if (plen > 0) | |
486 | memset(skb_put(user_skb, plen), 0, plen); | |
487 | } | |
488 | ||
bda56f14 | 489 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 490 | |
bda56f14 | 491 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
ccb1352e | 492 | out: |
36d5fe6a ZK |
493 | if (err) |
494 | skb_tx_error(skb); | |
ccb1352e JG |
495 | kfree_skb(nskb); |
496 | return err; | |
497 | } | |
498 | ||
ccb1352e JG |
499 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
500 | { | |
501 | struct ovs_header *ovs_header = info->userhdr; | |
502 | struct nlattr **a = info->attrs; | |
503 | struct sw_flow_actions *acts; | |
504 | struct sk_buff *packet; | |
505 | struct sw_flow *flow; | |
506 | struct datapath *dp; | |
507 | struct ethhdr *eth; | |
508 | int len; | |
509 | int err; | |
ccb1352e JG |
510 | |
511 | err = -EINVAL; | |
512 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 513 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
514 | goto err; |
515 | ||
516 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
517 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
518 | err = -ENOMEM; | |
519 | if (!packet) | |
520 | goto err; | |
521 | skb_reserve(packet, NET_IP_ALIGN); | |
522 | ||
32686a9d | 523 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e JG |
524 | |
525 | skb_reset_mac_header(packet); | |
526 | eth = eth_hdr(packet); | |
527 | ||
528 | /* Normally, setting the skb 'protocol' field would be handled by a | |
529 | * call to eth_type_trans(), but it assumes there's a sending | |
530 | * device, which we may not have. */ | |
e5c5d22e | 531 | if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) |
ccb1352e JG |
532 | packet->protocol = eth->h_proto; |
533 | else | |
534 | packet->protocol = htons(ETH_P_802_2); | |
535 | ||
536 | /* Build an sw_flow for sending this packet. */ | |
23dabf88 | 537 | flow = ovs_flow_alloc(); |
ccb1352e JG |
538 | err = PTR_ERR(flow); |
539 | if (IS_ERR(flow)) | |
540 | goto err_kfree_skb; | |
541 | ||
03f0d916 | 542 | err = ovs_flow_extract(packet, -1, &flow->key); |
ccb1352e JG |
543 | if (err) |
544 | goto err_flow_free; | |
545 | ||
e6445719 | 546 | err = ovs_nla_get_flow_metadata(flow, a[OVS_PACKET_ATTR_KEY]); |
ccb1352e JG |
547 | if (err) |
548 | goto err_flow_free; | |
e6445719 | 549 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS])); |
ccb1352e JG |
550 | err = PTR_ERR(acts); |
551 | if (IS_ERR(acts)) | |
552 | goto err_flow_free; | |
74f84a57 | 553 | |
e6445719 PS |
554 | err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], |
555 | &flow->key, 0, &acts); | |
ccb1352e | 556 | rcu_assign_pointer(flow->sf_acts, acts); |
74f84a57 PS |
557 | if (err) |
558 | goto err_flow_free; | |
ccb1352e JG |
559 | |
560 | OVS_CB(packet)->flow = flow; | |
03f0d916 | 561 | OVS_CB(packet)->pkt_key = &flow->key; |
ccb1352e | 562 | packet->priority = flow->key.phy.priority; |
39c7caeb | 563 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
564 | |
565 | rcu_read_lock(); | |
46df7b81 | 566 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
567 | err = -ENODEV; |
568 | if (!dp) | |
569 | goto err_unlock; | |
570 | ||
571 | local_bh_disable(); | |
572 | err = ovs_execute_actions(dp, packet); | |
573 | local_bh_enable(); | |
574 | rcu_read_unlock(); | |
575 | ||
03f0d916 | 576 | ovs_flow_free(flow, false); |
ccb1352e JG |
577 | return err; |
578 | ||
579 | err_unlock: | |
580 | rcu_read_unlock(); | |
581 | err_flow_free: | |
03f0d916 | 582 | ovs_flow_free(flow, false); |
ccb1352e JG |
583 | err_kfree_skb: |
584 | kfree_skb(packet); | |
585 | err: | |
586 | return err; | |
587 | } | |
588 | ||
589 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 590 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
591 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
592 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
593 | }; | |
594 | ||
4534de83 | 595 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e JG |
596 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
597 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
598 | .policy = packet_policy, | |
599 | .doit = ovs_packet_cmd_execute | |
600 | } | |
601 | }; | |
602 | ||
1bd7116f AZ |
603 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats, |
604 | struct ovs_dp_megaflow_stats *mega_stats) | |
ccb1352e JG |
605 | { |
606 | int i; | |
ccb1352e | 607 | |
1bd7116f AZ |
608 | memset(mega_stats, 0, sizeof(*mega_stats)); |
609 | ||
b637e498 | 610 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 611 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
612 | |
613 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 614 | |
ccb1352e JG |
615 | for_each_possible_cpu(i) { |
616 | const struct dp_stats_percpu *percpu_stats; | |
617 | struct dp_stats_percpu local_stats; | |
618 | unsigned int start; | |
619 | ||
620 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
621 | ||
622 | do { | |
57a7744e | 623 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 624 | local_stats = *percpu_stats; |
57a7744e | 625 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
626 | |
627 | stats->n_hit += local_stats.n_hit; | |
628 | stats->n_missed += local_stats.n_missed; | |
629 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 630 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
ccb1352e JG |
631 | } |
632 | } | |
633 | ||
634 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { | |
635 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
636 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
637 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
638 | }; | |
639 | ||
640 | static struct genl_family dp_flow_genl_family = { | |
641 | .id = GENL_ID_GENERATE, | |
642 | .hdrsize = sizeof(struct ovs_header), | |
643 | .name = OVS_FLOW_FAMILY, | |
644 | .version = OVS_FLOW_VERSION, | |
46df7b81 | 645 | .maxattr = OVS_FLOW_ATTR_MAX, |
3a4e0d6a PS |
646 | .netnsok = true, |
647 | .parallel_ops = true, | |
ccb1352e JG |
648 | }; |
649 | ||
650 | static struct genl_multicast_group ovs_dp_flow_multicast_group = { | |
651 | .name = OVS_FLOW_MCGROUP | |
652 | }; | |
653 | ||
c3ff8cfe TG |
654 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts) |
655 | { | |
656 | return NLMSG_ALIGN(sizeof(struct ovs_header)) | |
657 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */ | |
03f0d916 | 658 | + nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */ |
c3ff8cfe TG |
659 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
660 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
661 | + nla_total_size(8) /* OVS_FLOW_ATTR_USED */ | |
662 | + nla_total_size(acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
663 | } | |
664 | ||
bb6f9a70 | 665 | /* Called with ovs_mutex or RCU read lock. */ |
0e9796b4 | 666 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, |
15e47304 | 667 | struct sk_buff *skb, u32 portid, |
ccb1352e JG |
668 | u32 seq, u32 flags, u8 cmd) |
669 | { | |
670 | const int skb_orig_len = skb->len; | |
74f84a57 | 671 | struct nlattr *start; |
ccb1352e | 672 | struct ovs_flow_stats stats; |
e298e505 PS |
673 | __be16 tcp_flags; |
674 | unsigned long used; | |
ccb1352e JG |
675 | struct ovs_header *ovs_header; |
676 | struct nlattr *nla; | |
ccb1352e JG |
677 | int err; |
678 | ||
15e47304 | 679 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd); |
ccb1352e JG |
680 | if (!ovs_header) |
681 | return -EMSGSIZE; | |
682 | ||
0e9796b4 | 683 | ovs_header->dp_ifindex = dp_ifindex; |
ccb1352e | 684 | |
03f0d916 | 685 | /* Fill flow key. */ |
ccb1352e JG |
686 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
687 | if (!nla) | |
688 | goto nla_put_failure; | |
03f0d916 | 689 | |
e6445719 | 690 | err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb); |
03f0d916 AZ |
691 | if (err) |
692 | goto error; | |
693 | nla_nest_end(skb, nla); | |
694 | ||
695 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK); | |
696 | if (!nla) | |
697 | goto nla_put_failure; | |
698 | ||
e6445719 | 699 | err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb); |
ccb1352e JG |
700 | if (err) |
701 | goto error; | |
03f0d916 | 702 | |
ccb1352e JG |
703 | nla_nest_end(skb, nla); |
704 | ||
e298e505 | 705 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 706 | |
028d6a67 DM |
707 | if (used && |
708 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
709 | goto nla_put_failure; | |
ccb1352e | 710 | |
028d6a67 | 711 | if (stats.n_packets && |
e298e505 | 712 | nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats)) |
028d6a67 | 713 | goto nla_put_failure; |
ccb1352e | 714 | |
e298e505 PS |
715 | if ((u8)ntohs(tcp_flags) && |
716 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
028d6a67 | 717 | goto nla_put_failure; |
ccb1352e JG |
718 | |
719 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
720 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
721 | * Netlink but individual action lists can be longer than | |
722 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
723 | * The userspace caller can always fetch the actions separately if it | |
724 | * really wants them. (Most userspace callers in fact don't care.) | |
725 | * | |
726 | * This can only fail for dump operations because the skb is always | |
727 | * properly sized for single flows. | |
728 | */ | |
74f84a57 PS |
729 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
730 | if (start) { | |
d57170b1 PS |
731 | const struct sw_flow_actions *sf_acts; |
732 | ||
663efa36 | 733 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
734 | err = ovs_nla_put_actions(sf_acts->actions, |
735 | sf_acts->actions_len, skb); | |
0e9796b4 | 736 | |
74f84a57 PS |
737 | if (!err) |
738 | nla_nest_end(skb, start); | |
739 | else { | |
740 | if (skb_orig_len) | |
741 | goto error; | |
742 | ||
743 | nla_nest_cancel(skb, start); | |
744 | } | |
745 | } else if (skb_orig_len) | |
746 | goto nla_put_failure; | |
ccb1352e JG |
747 | |
748 | return genlmsg_end(skb, ovs_header); | |
749 | ||
750 | nla_put_failure: | |
751 | err = -EMSGSIZE; | |
752 | error: | |
753 | genlmsg_cancel(skb, ovs_header); | |
754 | return err; | |
755 | } | |
756 | ||
0e9796b4 JR |
757 | /* May not be called with RCU read lock. */ |
758 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
fb5d1e9e JR |
759 | struct genl_info *info, |
760 | bool always) | |
ccb1352e | 761 | { |
fb5d1e9e | 762 | struct sk_buff *skb; |
ccb1352e | 763 | |
fb5d1e9e JR |
764 | if (!always && !ovs_must_notify(info, &ovs_dp_flow_multicast_group)) |
765 | return NULL; | |
766 | ||
0e9796b4 | 767 | skb = genlmsg_new_unicast(ovs_flow_cmd_msg_size(acts), info, GFP_KERNEL); |
fb5d1e9e JR |
768 | if (!skb) |
769 | return ERR_PTR(-ENOMEM); | |
770 | ||
771 | return skb; | |
ccb1352e JG |
772 | } |
773 | ||
0e9796b4 JR |
774 | /* Called with ovs_mutex. */ |
775 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
776 | int dp_ifindex, | |
777 | struct genl_info *info, u8 cmd, | |
778 | bool always) | |
ccb1352e JG |
779 | { |
780 | struct sk_buff *skb; | |
781 | int retval; | |
782 | ||
0e9796b4 JR |
783 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), info, |
784 | always); | |
fb5d1e9e JR |
785 | if (!skb || IS_ERR(skb)) |
786 | return skb; | |
ccb1352e | 787 | |
0e9796b4 JR |
788 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
789 | info->snd_portid, info->snd_seq, 0, | |
790 | cmd); | |
ccb1352e JG |
791 | BUG_ON(retval < 0); |
792 | return skb; | |
793 | } | |
794 | ||
37bdc87b | 795 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e JG |
796 | { |
797 | struct nlattr **a = info->attrs; | |
798 | struct ovs_header *ovs_header = info->userhdr; | |
893f139b | 799 | struct sw_flow *flow, *new_flow; |
03f0d916 | 800 | struct sw_flow_mask mask; |
ccb1352e JG |
801 | struct sk_buff *reply; |
802 | struct datapath *dp; | |
37bdc87b | 803 | struct sw_flow_actions *acts; |
03f0d916 | 804 | struct sw_flow_match match; |
ccb1352e | 805 | int error; |
ccb1352e | 806 | |
893f139b | 807 | /* Must have key and actions. */ |
ccb1352e JG |
808 | error = -EINVAL; |
809 | if (!a[OVS_FLOW_ATTR_KEY]) | |
810 | goto error; | |
893f139b JR |
811 | if (!a[OVS_FLOW_ATTR_ACTIONS]) |
812 | goto error; | |
03f0d916 | 813 | |
893f139b JR |
814 | /* Most of the time we need to allocate a new flow, do it before |
815 | * locking. | |
816 | */ | |
817 | new_flow = ovs_flow_alloc(); | |
818 | if (IS_ERR(new_flow)) { | |
819 | error = PTR_ERR(new_flow); | |
820 | goto error; | |
821 | } | |
822 | ||
823 | /* Extract key. */ | |
824 | ovs_match_init(&match, &new_flow->unmasked_key, &mask); | |
23dabf88 | 825 | error = ovs_nla_get_match(&match, |
e6445719 | 826 | a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]); |
ccb1352e | 827 | if (error) |
893f139b | 828 | goto err_kfree_flow; |
ccb1352e | 829 | |
893f139b | 830 | ovs_flow_mask_key(&new_flow->key, &new_flow->unmasked_key, &mask); |
74f84a57 | 831 | |
893f139b | 832 | /* Validate actions. */ |
37bdc87b JR |
833 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS])); |
834 | error = PTR_ERR(acts); | |
835 | if (IS_ERR(acts)) | |
893f139b | 836 | goto err_kfree_flow; |
37bdc87b | 837 | |
893f139b JR |
838 | error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &new_flow->key, |
839 | 0, &acts); | |
37bdc87b JR |
840 | if (error) { |
841 | OVS_NLERR("Flow actions may not be safe on all matching packets.\n"); | |
893f139b JR |
842 | goto err_kfree_acts; |
843 | } | |
844 | ||
845 | reply = ovs_flow_cmd_alloc_info(acts, info, false); | |
846 | if (IS_ERR(reply)) { | |
847 | error = PTR_ERR(reply); | |
848 | goto err_kfree_acts; | |
ccb1352e JG |
849 | } |
850 | ||
8e4e1713 | 851 | ovs_lock(); |
46df7b81 | 852 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
893f139b JR |
853 | if (unlikely(!dp)) { |
854 | error = -ENODEV; | |
8e4e1713 | 855 | goto err_unlock_ovs; |
893f139b | 856 | } |
03f0d916 | 857 | /* Check if this is a duplicate flow */ |
893f139b JR |
858 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->unmasked_key); |
859 | if (likely(!flow)) { | |
860 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
861 | |
862 | /* Put flow in bucket. */ | |
893f139b JR |
863 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
864 | if (unlikely(error)) { | |
618ed0c8 | 865 | acts = NULL; |
893f139b JR |
866 | goto err_unlock_ovs; |
867 | } | |
868 | ||
869 | if (unlikely(reply)) { | |
870 | error = ovs_flow_cmd_fill_info(new_flow, | |
871 | ovs_header->dp_ifindex, | |
872 | reply, info->snd_portid, | |
873 | info->snd_seq, 0, | |
874 | OVS_FLOW_CMD_NEW); | |
875 | BUG_ON(error < 0); | |
618ed0c8 | 876 | } |
893f139b | 877 | ovs_unlock(); |
ccb1352e | 878 | } else { |
37bdc87b JR |
879 | struct sw_flow_actions *old_acts; |
880 | ||
ccb1352e JG |
881 | /* Bail out if we're not allowed to modify an existing flow. |
882 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
883 | * because Generic Netlink treats the latter as a dump | |
884 | * request. We also accept NLM_F_EXCL in case that bug ever | |
885 | * gets fixed. | |
886 | */ | |
893f139b JR |
887 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
888 | | NLM_F_EXCL))) { | |
889 | error = -EEXIST; | |
8e4e1713 | 890 | goto err_unlock_ovs; |
893f139b | 891 | } |
03f0d916 | 892 | /* The unmasked key has to be the same for flow updates. */ |
893f139b JR |
893 | if (unlikely(!ovs_flow_cmp_unmasked_key(flow, &match))) { |
894 | error = -EEXIST; | |
03f0d916 | 895 | goto err_unlock_ovs; |
893f139b | 896 | } |
37bdc87b JR |
897 | /* Update actions. */ |
898 | old_acts = ovsl_dereference(flow->sf_acts); | |
899 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 900 | |
893f139b JR |
901 | if (unlikely(reply)) { |
902 | error = ovs_flow_cmd_fill_info(flow, | |
903 | ovs_header->dp_ifindex, | |
904 | reply, info->snd_portid, | |
905 | info->snd_seq, 0, | |
906 | OVS_FLOW_CMD_NEW); | |
907 | BUG_ON(error < 0); | |
908 | } | |
909 | ovs_unlock(); | |
37bdc87b | 910 | |
893f139b JR |
911 | ovs_nla_free_flow_actions(old_acts); |
912 | ovs_flow_free(new_flow, false); | |
37bdc87b | 913 | } |
893f139b JR |
914 | |
915 | if (reply) | |
916 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
917 | return 0; |
918 | ||
37bdc87b JR |
919 | err_unlock_ovs: |
920 | ovs_unlock(); | |
893f139b JR |
921 | kfree_skb(reply); |
922 | err_kfree_acts: | |
37bdc87b | 923 | kfree(acts); |
893f139b JR |
924 | err_kfree_flow: |
925 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
926 | error: |
927 | return error; | |
928 | } | |
ccb1352e | 929 | |
37bdc87b JR |
930 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
931 | { | |
932 | struct nlattr **a = info->attrs; | |
933 | struct ovs_header *ovs_header = info->userhdr; | |
934 | struct sw_flow_key key, masked_key; | |
935 | struct sw_flow *flow; | |
936 | struct sw_flow_mask mask; | |
937 | struct sk_buff *reply = NULL; | |
938 | struct datapath *dp; | |
893f139b | 939 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b JR |
940 | struct sw_flow_match match; |
941 | int error; | |
942 | ||
943 | /* Extract key. */ | |
944 | error = -EINVAL; | |
945 | if (!a[OVS_FLOW_ATTR_KEY]) | |
946 | goto error; | |
947 | ||
948 | ovs_match_init(&match, &key, &mask); | |
949 | error = ovs_nla_get_match(&match, | |
950 | a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]); | |
951 | if (error) | |
952 | goto error; | |
953 | ||
954 | /* Validate actions. */ | |
955 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
956 | acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS])); | |
957 | error = PTR_ERR(acts); | |
958 | if (IS_ERR(acts)) | |
959 | goto error; | |
960 | ||
961 | ovs_flow_mask_key(&masked_key, &key, &mask); | |
962 | error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], | |
963 | &masked_key, 0, &acts); | |
964 | if (error) { | |
965 | OVS_NLERR("Flow actions may not be safe on all matching packets.\n"); | |
893f139b JR |
966 | goto err_kfree_acts; |
967 | } | |
968 | } | |
969 | ||
970 | /* Can allocate before locking if have acts. */ | |
971 | if (acts) { | |
972 | reply = ovs_flow_cmd_alloc_info(acts, info, false); | |
973 | if (IS_ERR(reply)) { | |
974 | error = PTR_ERR(reply); | |
975 | goto err_kfree_acts; | |
be52c9e9 | 976 | } |
37bdc87b | 977 | } |
0e9796b4 | 978 | |
37bdc87b JR |
979 | ovs_lock(); |
980 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); | |
893f139b JR |
981 | if (unlikely(!dp)) { |
982 | error = -ENODEV; | |
37bdc87b | 983 | goto err_unlock_ovs; |
893f139b | 984 | } |
37bdc87b JR |
985 | /* Check that the flow exists. */ |
986 | flow = ovs_flow_tbl_lookup(&dp->table, &key); | |
893f139b JR |
987 | if (unlikely(!flow)) { |
988 | error = -ENOENT; | |
37bdc87b | 989 | goto err_unlock_ovs; |
893f139b | 990 | } |
37bdc87b | 991 | /* The unmasked key has to be the same for flow updates. */ |
893f139b JR |
992 | if (unlikely(!ovs_flow_cmp_unmasked_key(flow, &match))) { |
993 | error = -EEXIST; | |
37bdc87b | 994 | goto err_unlock_ovs; |
893f139b | 995 | } |
37bdc87b | 996 | /* Update actions, if present. */ |
893f139b | 997 | if (likely(acts)) { |
37bdc87b JR |
998 | old_acts = ovsl_dereference(flow->sf_acts); |
999 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1000 | |
1001 | if (unlikely(reply)) { | |
1002 | error = ovs_flow_cmd_fill_info(flow, | |
1003 | ovs_header->dp_ifindex, | |
1004 | reply, info->snd_portid, | |
1005 | info->snd_seq, 0, | |
1006 | OVS_FLOW_CMD_NEW); | |
1007 | BUG_ON(error < 0); | |
1008 | } | |
1009 | } else { | |
1010 | /* Could not alloc without acts before locking. */ | |
1011 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
1012 | info, OVS_FLOW_CMD_NEW, false); | |
1013 | if (unlikely(IS_ERR(reply))) { | |
1014 | error = PTR_ERR(reply); | |
1015 | goto err_unlock_ovs; | |
1016 | } | |
ccb1352e | 1017 | } |
37bdc87b | 1018 | |
37bdc87b JR |
1019 | /* Clear stats. */ |
1020 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1021 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1022 | ovs_unlock(); |
ccb1352e | 1023 | |
893f139b JR |
1024 | if (reply) |
1025 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1026 | if (old_acts) | |
1027 | ovs_nla_free_flow_actions(old_acts); | |
fb5d1e9e | 1028 | |
ccb1352e JG |
1029 | return 0; |
1030 | ||
8e4e1713 PS |
1031 | err_unlock_ovs: |
1032 | ovs_unlock(); | |
893f139b JR |
1033 | kfree_skb(reply); |
1034 | err_kfree_acts: | |
74f84a57 | 1035 | kfree(acts); |
ccb1352e JG |
1036 | error: |
1037 | return error; | |
1038 | } | |
1039 | ||
1040 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1041 | { | |
1042 | struct nlattr **a = info->attrs; | |
1043 | struct ovs_header *ovs_header = info->userhdr; | |
1044 | struct sw_flow_key key; | |
1045 | struct sk_buff *reply; | |
1046 | struct sw_flow *flow; | |
1047 | struct datapath *dp; | |
03f0d916 | 1048 | struct sw_flow_match match; |
ccb1352e | 1049 | int err; |
ccb1352e | 1050 | |
03f0d916 AZ |
1051 | if (!a[OVS_FLOW_ATTR_KEY]) { |
1052 | OVS_NLERR("Flow get message rejected, Key attribute missing.\n"); | |
ccb1352e | 1053 | return -EINVAL; |
03f0d916 AZ |
1054 | } |
1055 | ||
1056 | ovs_match_init(&match, &key, NULL); | |
23dabf88 | 1057 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL); |
ccb1352e JG |
1058 | if (err) |
1059 | return err; | |
1060 | ||
8e4e1713 | 1061 | ovs_lock(); |
46df7b81 | 1062 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1063 | if (!dp) { |
1064 | err = -ENODEV; | |
1065 | goto unlock; | |
1066 | } | |
ccb1352e | 1067 | |
5bb50632 | 1068 | flow = ovs_flow_tbl_lookup(&dp->table, &key); |
e6445719 | 1069 | if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) { |
8e4e1713 PS |
1070 | err = -ENOENT; |
1071 | goto unlock; | |
1072 | } | |
ccb1352e | 1073 | |
0e9796b4 JR |
1074 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
1075 | OVS_FLOW_CMD_NEW, true); | |
8e4e1713 PS |
1076 | if (IS_ERR(reply)) { |
1077 | err = PTR_ERR(reply); | |
1078 | goto unlock; | |
1079 | } | |
ccb1352e | 1080 | |
8e4e1713 | 1081 | ovs_unlock(); |
ccb1352e | 1082 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1083 | unlock: |
1084 | ovs_unlock(); | |
1085 | return err; | |
ccb1352e JG |
1086 | } |
1087 | ||
1088 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1089 | { | |
1090 | struct nlattr **a = info->attrs; | |
1091 | struct ovs_header *ovs_header = info->userhdr; | |
1092 | struct sw_flow_key key; | |
1093 | struct sk_buff *reply; | |
1094 | struct sw_flow *flow; | |
1095 | struct datapath *dp; | |
03f0d916 | 1096 | struct sw_flow_match match; |
ccb1352e | 1097 | int err; |
ccb1352e | 1098 | |
aed06778 JR |
1099 | if (likely(a[OVS_FLOW_ATTR_KEY])) { |
1100 | ovs_match_init(&match, &key, NULL); | |
1101 | err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL); | |
1102 | if (unlikely(err)) | |
1103 | return err; | |
1104 | } | |
1105 | ||
8e4e1713 | 1106 | ovs_lock(); |
46df7b81 | 1107 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1108 | if (unlikely(!dp)) { |
8e4e1713 PS |
1109 | err = -ENODEV; |
1110 | goto unlock; | |
1111 | } | |
46df7b81 | 1112 | |
aed06778 | 1113 | if (unlikely(!a[OVS_FLOW_ATTR_KEY])) { |
b637e498 | 1114 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1115 | goto unlock; |
1116 | } | |
03f0d916 | 1117 | |
5bb50632 | 1118 | flow = ovs_flow_tbl_lookup(&dp->table, &key); |
aed06778 | 1119 | if (unlikely(!flow || !ovs_flow_cmp_unmasked_key(flow, &match))) { |
8e4e1713 PS |
1120 | err = -ENOENT; |
1121 | goto unlock; | |
1122 | } | |
ccb1352e | 1123 | |
b637e498 | 1124 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1125 | ovs_unlock(); |
ccb1352e | 1126 | |
aed06778 JR |
1127 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
1128 | info, false); | |
1129 | if (likely(reply)) { | |
1130 | if (likely(!IS_ERR(reply))) { | |
1131 | rcu_read_lock(); /*To keep RCU checker happy. */ | |
1132 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1133 | reply, info->snd_portid, | |
1134 | info->snd_seq, 0, | |
1135 | OVS_FLOW_CMD_DEL); | |
1136 | rcu_read_unlock(); | |
1137 | BUG_ON(err < 0); | |
1138 | ||
1139 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1140 | } else { | |
1141 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); | |
1142 | } | |
fb5d1e9e | 1143 | } |
ccb1352e | 1144 | |
aed06778 | 1145 | ovs_flow_free(flow, true); |
ccb1352e | 1146 | return 0; |
8e4e1713 PS |
1147 | unlock: |
1148 | ovs_unlock(); | |
1149 | return err; | |
ccb1352e JG |
1150 | } |
1151 | ||
1152 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1153 | { | |
1154 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
b637e498 | 1155 | struct table_instance *ti; |
ccb1352e | 1156 | struct datapath *dp; |
ccb1352e | 1157 | |
d57170b1 | 1158 | rcu_read_lock(); |
46df7b81 | 1159 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1160 | if (!dp) { |
d57170b1 | 1161 | rcu_read_unlock(); |
ccb1352e | 1162 | return -ENODEV; |
8e4e1713 | 1163 | } |
ccb1352e | 1164 | |
b637e498 | 1165 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1166 | for (;;) { |
1167 | struct sw_flow *flow; | |
1168 | u32 bucket, obj; | |
1169 | ||
1170 | bucket = cb->args[0]; | |
1171 | obj = cb->args[1]; | |
b637e498 | 1172 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1173 | if (!flow) |
1174 | break; | |
1175 | ||
0e9796b4 | 1176 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1177 | NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1178 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1179 | OVS_FLOW_CMD_NEW) < 0) | |
1180 | break; | |
1181 | ||
1182 | cb->args[0] = bucket; | |
1183 | cb->args[1] = obj; | |
1184 | } | |
d57170b1 | 1185 | rcu_read_unlock(); |
ccb1352e JG |
1186 | return skb->len; |
1187 | } | |
1188 | ||
4534de83 | 1189 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e JG |
1190 | { .cmd = OVS_FLOW_CMD_NEW, |
1191 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1192 | .policy = flow_policy, | |
37bdc87b | 1193 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1194 | }, |
1195 | { .cmd = OVS_FLOW_CMD_DEL, | |
1196 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1197 | .policy = flow_policy, | |
1198 | .doit = ovs_flow_cmd_del | |
1199 | }, | |
1200 | { .cmd = OVS_FLOW_CMD_GET, | |
1201 | .flags = 0, /* OK for unprivileged users. */ | |
1202 | .policy = flow_policy, | |
1203 | .doit = ovs_flow_cmd_get, | |
1204 | .dumpit = ovs_flow_cmd_dump | |
1205 | }, | |
1206 | { .cmd = OVS_FLOW_CMD_SET, | |
1207 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1208 | .policy = flow_policy, | |
37bdc87b | 1209 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1210 | }, |
1211 | }; | |
1212 | ||
1213 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { | |
1214 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1215 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
43d4be9c | 1216 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, |
ccb1352e JG |
1217 | }; |
1218 | ||
1219 | static struct genl_family dp_datapath_genl_family = { | |
1220 | .id = GENL_ID_GENERATE, | |
1221 | .hdrsize = sizeof(struct ovs_header), | |
1222 | .name = OVS_DATAPATH_FAMILY, | |
1223 | .version = OVS_DATAPATH_VERSION, | |
46df7b81 | 1224 | .maxattr = OVS_DP_ATTR_MAX, |
3a4e0d6a PS |
1225 | .netnsok = true, |
1226 | .parallel_ops = true, | |
ccb1352e JG |
1227 | }; |
1228 | ||
1229 | static struct genl_multicast_group ovs_dp_datapath_multicast_group = { | |
1230 | .name = OVS_DATAPATH_MCGROUP | |
1231 | }; | |
1232 | ||
c3ff8cfe TG |
1233 | static size_t ovs_dp_cmd_msg_size(void) |
1234 | { | |
1235 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1236 | ||
1237 | msgsize += nla_total_size(IFNAMSIZ); | |
1238 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
1bd7116f | 1239 | msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats)); |
45fb9c35 | 1240 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
c3ff8cfe TG |
1241 | |
1242 | return msgsize; | |
1243 | } | |
1244 | ||
bb6f9a70 | 1245 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1246 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1247 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1248 | { |
1249 | struct ovs_header *ovs_header; | |
1250 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1251 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1252 | int err; |
1253 | ||
15e47304 | 1254 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1255 | flags, cmd); |
1256 | if (!ovs_header) | |
1257 | goto error; | |
1258 | ||
1259 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1260 | ||
ccb1352e | 1261 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1262 | if (err) |
1263 | goto nla_put_failure; | |
1264 | ||
1bd7116f AZ |
1265 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
1266 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), | |
1267 | &dp_stats)) | |
1268 | goto nla_put_failure; | |
1269 | ||
1270 | if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS, | |
1271 | sizeof(struct ovs_dp_megaflow_stats), | |
1272 | &dp_megaflow_stats)) | |
028d6a67 | 1273 | goto nla_put_failure; |
ccb1352e | 1274 | |
43d4be9c TG |
1275 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1276 | goto nla_put_failure; | |
1277 | ||
ccb1352e JG |
1278 | return genlmsg_end(skb, ovs_header); |
1279 | ||
1280 | nla_put_failure: | |
1281 | genlmsg_cancel(skb, ovs_header); | |
1282 | error: | |
1283 | return -EMSGSIZE; | |
1284 | } | |
1285 | ||
6093ae9a | 1286 | static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info) |
ccb1352e | 1287 | { |
6093ae9a | 1288 | return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL); |
ccb1352e JG |
1289 | } |
1290 | ||
bb6f9a70 | 1291 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 PS |
1292 | static struct datapath *lookup_datapath(struct net *net, |
1293 | struct ovs_header *ovs_header, | |
ccb1352e JG |
1294 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1295 | { | |
1296 | struct datapath *dp; | |
1297 | ||
1298 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1299 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1300 | else { |
1301 | struct vport *vport; | |
1302 | ||
46df7b81 | 1303 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1304 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1305 | } |
1306 | return dp ? dp : ERR_PTR(-ENODEV); | |
1307 | } | |
1308 | ||
44da5ae5 TG |
1309 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1310 | { | |
1311 | struct datapath *dp; | |
1312 | ||
1313 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
3c7eacfc | 1314 | if (IS_ERR(dp)) |
44da5ae5 TG |
1315 | return; |
1316 | ||
1317 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1318 | dp->user_features = 0; | |
1319 | } | |
1320 | ||
43d4be9c TG |
1321 | static void ovs_dp_change(struct datapath *dp, struct nlattr **a) |
1322 | { | |
1323 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1324 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1325 | } | |
1326 | ||
ccb1352e JG |
1327 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1328 | { | |
1329 | struct nlattr **a = info->attrs; | |
1330 | struct vport_parms parms; | |
1331 | struct sk_buff *reply; | |
1332 | struct datapath *dp; | |
1333 | struct vport *vport; | |
46df7b81 | 1334 | struct ovs_net *ovs_net; |
15eac2a7 | 1335 | int err, i; |
ccb1352e JG |
1336 | |
1337 | err = -EINVAL; | |
1338 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1339 | goto err; | |
1340 | ||
6093ae9a JR |
1341 | reply = ovs_dp_cmd_alloc_info(info); |
1342 | if (!reply) | |
1343 | return -ENOMEM; | |
ccb1352e JG |
1344 | |
1345 | err = -ENOMEM; | |
1346 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1347 | if (dp == NULL) | |
6093ae9a | 1348 | goto err_free_reply; |
46df7b81 | 1349 | |
46df7b81 | 1350 | ovs_dp_set_net(dp, hold_net(sock_net(skb->sk))); |
ccb1352e JG |
1351 | |
1352 | /* Allocate table. */ | |
b637e498 PS |
1353 | err = ovs_flow_tbl_init(&dp->table); |
1354 | if (err) | |
ccb1352e JG |
1355 | goto err_free_dp; |
1356 | ||
1c213bd2 | 1357 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
ccb1352e JG |
1358 | if (!dp->stats_percpu) { |
1359 | err = -ENOMEM; | |
1360 | goto err_destroy_table; | |
1361 | } | |
1362 | ||
15eac2a7 | 1363 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
e6445719 | 1364 | GFP_KERNEL); |
15eac2a7 PS |
1365 | if (!dp->ports) { |
1366 | err = -ENOMEM; | |
1367 | goto err_destroy_percpu; | |
1368 | } | |
1369 | ||
1370 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1371 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1372 | ||
ccb1352e JG |
1373 | /* Set up our datapath device. */ |
1374 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1375 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1376 | parms.options = NULL; | |
1377 | parms.dp = dp; | |
1378 | parms.port_no = OVSP_LOCAL; | |
15e47304 | 1379 | parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); |
ccb1352e | 1380 | |
43d4be9c TG |
1381 | ovs_dp_change(dp, a); |
1382 | ||
6093ae9a JR |
1383 | /* So far only local changes have been made, now need the lock. */ |
1384 | ovs_lock(); | |
1385 | ||
ccb1352e JG |
1386 | vport = new_vport(&parms); |
1387 | if (IS_ERR(vport)) { | |
1388 | err = PTR_ERR(vport); | |
1389 | if (err == -EBUSY) | |
1390 | err = -EEXIST; | |
1391 | ||
44da5ae5 TG |
1392 | if (err == -EEXIST) { |
1393 | /* An outdated user space instance that does not understand | |
1394 | * the concept of user_features has attempted to create a new | |
1395 | * datapath and is likely to reuse it. Drop all user features. | |
1396 | */ | |
1397 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1398 | ovs_dp_reset_user_features(skb, info); | |
1399 | } | |
1400 | ||
15eac2a7 | 1401 | goto err_destroy_ports_array; |
ccb1352e JG |
1402 | } |
1403 | ||
6093ae9a JR |
1404 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1405 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1406 | BUG_ON(err < 0); | |
ccb1352e | 1407 | |
46df7b81 | 1408 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1409 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1410 | |
1411 | ovs_unlock(); | |
ccb1352e | 1412 | |
2a94fe48 | 1413 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1414 | return 0; |
1415 | ||
15eac2a7 | 1416 | err_destroy_ports_array: |
6093ae9a | 1417 | ovs_unlock(); |
15eac2a7 | 1418 | kfree(dp->ports); |
ccb1352e JG |
1419 | err_destroy_percpu: |
1420 | free_percpu(dp->stats_percpu); | |
1421 | err_destroy_table: | |
e80857cc | 1422 | ovs_flow_tbl_destroy(&dp->table, false); |
ccb1352e | 1423 | err_free_dp: |
46df7b81 | 1424 | release_net(ovs_dp_get_net(dp)); |
ccb1352e | 1425 | kfree(dp); |
6093ae9a JR |
1426 | err_free_reply: |
1427 | kfree_skb(reply); | |
ccb1352e JG |
1428 | err: |
1429 | return err; | |
1430 | } | |
1431 | ||
8e4e1713 | 1432 | /* Called with ovs_mutex. */ |
46df7b81 | 1433 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1434 | { |
15eac2a7 | 1435 | int i; |
ccb1352e | 1436 | |
15eac2a7 PS |
1437 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1438 | struct vport *vport; | |
b67bfe0d | 1439 | struct hlist_node *n; |
15eac2a7 | 1440 | |
b67bfe0d | 1441 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1442 | if (vport->port_no != OVSP_LOCAL) |
1443 | ovs_dp_detach_port(vport); | |
1444 | } | |
ccb1352e | 1445 | |
59a35d60 | 1446 | list_del_rcu(&dp->list_node); |
ccb1352e | 1447 | |
8e4e1713 | 1448 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1449 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1450 | */ |
8e4e1713 | 1451 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1452 | |
e80857cc AZ |
1453 | /* RCU destroy the flow table */ |
1454 | ovs_flow_tbl_destroy(&dp->table, true); | |
1455 | ||
ccb1352e | 1456 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1457 | } |
1458 | ||
1459 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1460 | { | |
1461 | struct sk_buff *reply; | |
1462 | struct datapath *dp; | |
1463 | int err; | |
1464 | ||
6093ae9a JR |
1465 | reply = ovs_dp_cmd_alloc_info(info); |
1466 | if (!reply) | |
1467 | return -ENOMEM; | |
1468 | ||
8e4e1713 | 1469 | ovs_lock(); |
46df7b81 PS |
1470 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1471 | err = PTR_ERR(dp); | |
1472 | if (IS_ERR(dp)) | |
6093ae9a | 1473 | goto err_unlock_free; |
46df7b81 | 1474 | |
6093ae9a JR |
1475 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1476 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1477 | BUG_ON(err < 0); | |
46df7b81 PS |
1478 | |
1479 | __dp_destroy(dp); | |
8e4e1713 | 1480 | ovs_unlock(); |
ccb1352e | 1481 | |
2a94fe48 | 1482 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1483 | |
1484 | return 0; | |
6093ae9a JR |
1485 | |
1486 | err_unlock_free: | |
8e4e1713 | 1487 | ovs_unlock(); |
6093ae9a | 1488 | kfree_skb(reply); |
8e4e1713 | 1489 | return err; |
ccb1352e JG |
1490 | } |
1491 | ||
1492 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1493 | { | |
1494 | struct sk_buff *reply; | |
1495 | struct datapath *dp; | |
1496 | int err; | |
1497 | ||
6093ae9a JR |
1498 | reply = ovs_dp_cmd_alloc_info(info); |
1499 | if (!reply) | |
1500 | return -ENOMEM; | |
1501 | ||
8e4e1713 | 1502 | ovs_lock(); |
46df7b81 | 1503 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1504 | err = PTR_ERR(dp); |
ccb1352e | 1505 | if (IS_ERR(dp)) |
6093ae9a | 1506 | goto err_unlock_free; |
ccb1352e | 1507 | |
43d4be9c TG |
1508 | ovs_dp_change(dp, info->attrs); |
1509 | ||
6093ae9a JR |
1510 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1511 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1512 | BUG_ON(err < 0); | |
ccb1352e | 1513 | |
8e4e1713 | 1514 | ovs_unlock(); |
2a94fe48 | 1515 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1516 | |
1517 | return 0; | |
6093ae9a JR |
1518 | |
1519 | err_unlock_free: | |
8e4e1713 | 1520 | ovs_unlock(); |
6093ae9a | 1521 | kfree_skb(reply); |
8e4e1713 | 1522 | return err; |
ccb1352e JG |
1523 | } |
1524 | ||
1525 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1526 | { | |
1527 | struct sk_buff *reply; | |
1528 | struct datapath *dp; | |
8e4e1713 | 1529 | int err; |
ccb1352e | 1530 | |
6093ae9a JR |
1531 | reply = ovs_dp_cmd_alloc_info(info); |
1532 | if (!reply) | |
1533 | return -ENOMEM; | |
1534 | ||
1535 | rcu_read_lock(); | |
46df7b81 | 1536 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1537 | if (IS_ERR(dp)) { |
1538 | err = PTR_ERR(dp); | |
6093ae9a | 1539 | goto err_unlock_free; |
8e4e1713 | 1540 | } |
6093ae9a JR |
1541 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1542 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1543 | BUG_ON(err < 0); | |
1544 | rcu_read_unlock(); | |
ccb1352e JG |
1545 | |
1546 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1547 | |
6093ae9a JR |
1548 | err_unlock_free: |
1549 | rcu_read_unlock(); | |
1550 | kfree_skb(reply); | |
8e4e1713 | 1551 | return err; |
ccb1352e JG |
1552 | } |
1553 | ||
1554 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1555 | { | |
46df7b81 | 1556 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1557 | struct datapath *dp; |
1558 | int skip = cb->args[0]; | |
1559 | int i = 0; | |
1560 | ||
59a35d60 PS |
1561 | rcu_read_lock(); |
1562 | list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1563 | if (i >= skip && |
15e47304 | 1564 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1565 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1566 | OVS_DP_CMD_NEW) < 0) | |
1567 | break; | |
1568 | i++; | |
1569 | } | |
59a35d60 | 1570 | rcu_read_unlock(); |
ccb1352e JG |
1571 | |
1572 | cb->args[0] = i; | |
1573 | ||
1574 | return skb->len; | |
1575 | } | |
1576 | ||
4534de83 | 1577 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e JG |
1578 | { .cmd = OVS_DP_CMD_NEW, |
1579 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1580 | .policy = datapath_policy, | |
1581 | .doit = ovs_dp_cmd_new | |
1582 | }, | |
1583 | { .cmd = OVS_DP_CMD_DEL, | |
1584 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1585 | .policy = datapath_policy, | |
1586 | .doit = ovs_dp_cmd_del | |
1587 | }, | |
1588 | { .cmd = OVS_DP_CMD_GET, | |
1589 | .flags = 0, /* OK for unprivileged users. */ | |
1590 | .policy = datapath_policy, | |
1591 | .doit = ovs_dp_cmd_get, | |
1592 | .dumpit = ovs_dp_cmd_dump | |
1593 | }, | |
1594 | { .cmd = OVS_DP_CMD_SET, | |
1595 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1596 | .policy = datapath_policy, | |
1597 | .doit = ovs_dp_cmd_set, | |
1598 | }, | |
1599 | }; | |
1600 | ||
1601 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { | |
1602 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1603 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
1604 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
1605 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
1606 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1607 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
1608 | }; | |
1609 | ||
68eb5503 | 1610 | struct genl_family dp_vport_genl_family = { |
ccb1352e JG |
1611 | .id = GENL_ID_GENERATE, |
1612 | .hdrsize = sizeof(struct ovs_header), | |
1613 | .name = OVS_VPORT_FAMILY, | |
1614 | .version = OVS_VPORT_VERSION, | |
46df7b81 | 1615 | .maxattr = OVS_VPORT_ATTR_MAX, |
3a4e0d6a PS |
1616 | .netnsok = true, |
1617 | .parallel_ops = true, | |
ccb1352e JG |
1618 | }; |
1619 | ||
443cd88c | 1620 | static struct genl_multicast_group ovs_dp_vport_multicast_group = { |
ccb1352e JG |
1621 | .name = OVS_VPORT_MCGROUP |
1622 | }; | |
1623 | ||
8e4e1713 | 1624 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1625 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
15e47304 | 1626 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1627 | { |
1628 | struct ovs_header *ovs_header; | |
1629 | struct ovs_vport_stats vport_stats; | |
1630 | int err; | |
1631 | ||
15e47304 | 1632 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1633 | flags, cmd); |
1634 | if (!ovs_header) | |
1635 | return -EMSGSIZE; | |
1636 | ||
1637 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1638 | ||
028d6a67 DM |
1639 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1640 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
1641 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport)) || | |
15e47304 | 1642 | nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_portid)) |
028d6a67 | 1643 | goto nla_put_failure; |
ccb1352e JG |
1644 | |
1645 | ovs_vport_get_stats(vport, &vport_stats); | |
028d6a67 DM |
1646 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1647 | &vport_stats)) | |
1648 | goto nla_put_failure; | |
ccb1352e JG |
1649 | |
1650 | err = ovs_vport_get_options(vport, skb); | |
1651 | if (err == -EMSGSIZE) | |
1652 | goto error; | |
1653 | ||
1654 | return genlmsg_end(skb, ovs_header); | |
1655 | ||
1656 | nla_put_failure: | |
1657 | err = -EMSGSIZE; | |
1658 | error: | |
1659 | genlmsg_cancel(skb, ovs_header); | |
1660 | return err; | |
1661 | } | |
1662 | ||
6093ae9a JR |
1663 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1664 | { | |
1665 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1666 | } | |
1667 | ||
1668 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
15e47304 | 1669 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
ccb1352e JG |
1670 | u32 seq, u8 cmd) |
1671 | { | |
1672 | struct sk_buff *skb; | |
1673 | int retval; | |
1674 | ||
1675 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
1676 | if (!skb) | |
1677 | return ERR_PTR(-ENOMEM); | |
1678 | ||
15e47304 | 1679 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
a9341512 JG |
1680 | BUG_ON(retval < 0); |
1681 | ||
ccb1352e JG |
1682 | return skb; |
1683 | } | |
1684 | ||
8e4e1713 | 1685 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 PS |
1686 | static struct vport *lookup_vport(struct net *net, |
1687 | struct ovs_header *ovs_header, | |
ccb1352e JG |
1688 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
1689 | { | |
1690 | struct datapath *dp; | |
1691 | struct vport *vport; | |
1692 | ||
1693 | if (a[OVS_VPORT_ATTR_NAME]) { | |
46df7b81 | 1694 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
1695 | if (!vport) |
1696 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
1697 | if (ovs_header->dp_ifindex && |
1698 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1699 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
1700 | return vport; |
1701 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1702 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1703 | ||
1704 | if (port_no >= DP_MAX_PORTS) | |
1705 | return ERR_PTR(-EFBIG); | |
1706 | ||
46df7b81 | 1707 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1708 | if (!dp) |
1709 | return ERR_PTR(-ENODEV); | |
1710 | ||
8e4e1713 | 1711 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 1712 | if (!vport) |
14408dba | 1713 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
1714 | return vport; |
1715 | } else | |
1716 | return ERR_PTR(-EINVAL); | |
1717 | } | |
1718 | ||
1719 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) | |
1720 | { | |
1721 | struct nlattr **a = info->attrs; | |
1722 | struct ovs_header *ovs_header = info->userhdr; | |
1723 | struct vport_parms parms; | |
1724 | struct sk_buff *reply; | |
1725 | struct vport *vport; | |
1726 | struct datapath *dp; | |
1727 | u32 port_no; | |
1728 | int err; | |
1729 | ||
ccb1352e JG |
1730 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1731 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a JR |
1732 | return -EINVAL; |
1733 | ||
1734 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
1735 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
1736 | if (port_no >= DP_MAX_PORTS) | |
1737 | return -EFBIG; | |
1738 | ||
1739 | reply = ovs_vport_cmd_alloc_info(); | |
1740 | if (!reply) | |
1741 | return -ENOMEM; | |
ccb1352e | 1742 | |
8e4e1713 | 1743 | ovs_lock(); |
46df7b81 | 1744 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
1745 | err = -ENODEV; |
1746 | if (!dp) | |
6093ae9a | 1747 | goto exit_unlock_free; |
ccb1352e | 1748 | |
6093ae9a | 1749 | if (port_no) { |
8e4e1713 | 1750 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1751 | err = -EBUSY; |
1752 | if (vport) | |
6093ae9a | 1753 | goto exit_unlock_free; |
ccb1352e JG |
1754 | } else { |
1755 | for (port_no = 1; ; port_no++) { | |
1756 | if (port_no >= DP_MAX_PORTS) { | |
1757 | err = -EFBIG; | |
6093ae9a | 1758 | goto exit_unlock_free; |
ccb1352e | 1759 | } |
8e4e1713 | 1760 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
1761 | if (!vport) |
1762 | break; | |
1763 | } | |
1764 | } | |
1765 | ||
1766 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
1767 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1768 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
1769 | parms.dp = dp; | |
1770 | parms.port_no = port_no; | |
15e47304 | 1771 | parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
ccb1352e JG |
1772 | |
1773 | vport = new_vport(&parms); | |
1774 | err = PTR_ERR(vport); | |
1775 | if (IS_ERR(vport)) | |
6093ae9a | 1776 | goto exit_unlock_free; |
ccb1352e | 1777 | |
6093ae9a JR |
1778 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1779 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1780 | BUG_ON(err < 0); | |
1781 | ovs_unlock(); | |
ed661185 | 1782 | |
2a94fe48 | 1783 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 1784 | return 0; |
ccb1352e | 1785 | |
6093ae9a | 1786 | exit_unlock_free: |
8e4e1713 | 1787 | ovs_unlock(); |
6093ae9a | 1788 | kfree_skb(reply); |
ccb1352e JG |
1789 | return err; |
1790 | } | |
1791 | ||
1792 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1793 | { | |
1794 | struct nlattr **a = info->attrs; | |
1795 | struct sk_buff *reply; | |
1796 | struct vport *vport; | |
1797 | int err; | |
1798 | ||
6093ae9a JR |
1799 | reply = ovs_vport_cmd_alloc_info(); |
1800 | if (!reply) | |
1801 | return -ENOMEM; | |
1802 | ||
8e4e1713 | 1803 | ovs_lock(); |
46df7b81 | 1804 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
1805 | err = PTR_ERR(vport); |
1806 | if (IS_ERR(vport)) | |
6093ae9a | 1807 | goto exit_unlock_free; |
ccb1352e | 1808 | |
ccb1352e | 1809 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 1810 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 1811 | err = -EINVAL; |
6093ae9a | 1812 | goto exit_unlock_free; |
a9341512 JG |
1813 | } |
1814 | ||
f44f3408 | 1815 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 1816 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 1817 | if (err) |
6093ae9a | 1818 | goto exit_unlock_free; |
f44f3408 | 1819 | } |
a9341512 | 1820 | |
03fbf8b3 | 1821 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) |
15e47304 | 1822 | vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
ccb1352e | 1823 | |
a9341512 JG |
1824 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1825 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1826 | BUG_ON(err < 0); | |
ccb1352e | 1827 | |
8e4e1713 | 1828 | ovs_unlock(); |
2a94fe48 | 1829 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 1830 | return 0; |
ccb1352e | 1831 | |
6093ae9a | 1832 | exit_unlock_free: |
8e4e1713 | 1833 | ovs_unlock(); |
6093ae9a | 1834 | kfree_skb(reply); |
ccb1352e JG |
1835 | return err; |
1836 | } | |
1837 | ||
1838 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1839 | { | |
1840 | struct nlattr **a = info->attrs; | |
1841 | struct sk_buff *reply; | |
1842 | struct vport *vport; | |
1843 | int err; | |
1844 | ||
6093ae9a JR |
1845 | reply = ovs_vport_cmd_alloc_info(); |
1846 | if (!reply) | |
1847 | return -ENOMEM; | |
1848 | ||
8e4e1713 | 1849 | ovs_lock(); |
46df7b81 | 1850 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
1851 | err = PTR_ERR(vport); |
1852 | if (IS_ERR(vport)) | |
6093ae9a | 1853 | goto exit_unlock_free; |
ccb1352e JG |
1854 | |
1855 | if (vport->port_no == OVSP_LOCAL) { | |
1856 | err = -EINVAL; | |
6093ae9a | 1857 | goto exit_unlock_free; |
ccb1352e JG |
1858 | } |
1859 | ||
6093ae9a JR |
1860 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1861 | info->snd_seq, 0, OVS_VPORT_CMD_DEL); | |
1862 | BUG_ON(err < 0); | |
ccb1352e | 1863 | ovs_dp_detach_port(vport); |
6093ae9a | 1864 | ovs_unlock(); |
ccb1352e | 1865 | |
2a94fe48 | 1866 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 1867 | return 0; |
ccb1352e | 1868 | |
6093ae9a | 1869 | exit_unlock_free: |
8e4e1713 | 1870 | ovs_unlock(); |
6093ae9a | 1871 | kfree_skb(reply); |
ccb1352e JG |
1872 | return err; |
1873 | } | |
1874 | ||
1875 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1876 | { | |
1877 | struct nlattr **a = info->attrs; | |
1878 | struct ovs_header *ovs_header = info->userhdr; | |
1879 | struct sk_buff *reply; | |
1880 | struct vport *vport; | |
1881 | int err; | |
1882 | ||
6093ae9a JR |
1883 | reply = ovs_vport_cmd_alloc_info(); |
1884 | if (!reply) | |
1885 | return -ENOMEM; | |
1886 | ||
ccb1352e | 1887 | rcu_read_lock(); |
46df7b81 | 1888 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
1889 | err = PTR_ERR(vport); |
1890 | if (IS_ERR(vport)) | |
6093ae9a JR |
1891 | goto exit_unlock_free; |
1892 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, | |
1893 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1894 | BUG_ON(err < 0); | |
ccb1352e JG |
1895 | rcu_read_unlock(); |
1896 | ||
1897 | return genlmsg_reply(reply, info); | |
1898 | ||
6093ae9a | 1899 | exit_unlock_free: |
ccb1352e | 1900 | rcu_read_unlock(); |
6093ae9a | 1901 | kfree_skb(reply); |
ccb1352e JG |
1902 | return err; |
1903 | } | |
1904 | ||
1905 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1906 | { | |
1907 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
1908 | struct datapath *dp; | |
15eac2a7 PS |
1909 | int bucket = cb->args[0], skip = cb->args[1]; |
1910 | int i, j = 0; | |
ccb1352e | 1911 | |
42ee19e2 | 1912 | rcu_read_lock(); |
46df7b81 | 1913 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
1914 | if (!dp) { |
1915 | rcu_read_unlock(); | |
ccb1352e | 1916 | return -ENODEV; |
42ee19e2 | 1917 | } |
15eac2a7 | 1918 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 1919 | struct vport *vport; |
15eac2a7 PS |
1920 | |
1921 | j = 0; | |
b67bfe0d | 1922 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
1923 | if (j >= skip && |
1924 | ovs_vport_cmd_fill_info(vport, skb, | |
15e47304 | 1925 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
1926 | cb->nlh->nlmsg_seq, |
1927 | NLM_F_MULTI, | |
1928 | OVS_VPORT_CMD_NEW) < 0) | |
1929 | goto out; | |
1930 | ||
1931 | j++; | |
1932 | } | |
1933 | skip = 0; | |
ccb1352e | 1934 | } |
15eac2a7 | 1935 | out: |
ccb1352e JG |
1936 | rcu_read_unlock(); |
1937 | ||
15eac2a7 PS |
1938 | cb->args[0] = i; |
1939 | cb->args[1] = j; | |
ccb1352e | 1940 | |
15eac2a7 | 1941 | return skb->len; |
ccb1352e JG |
1942 | } |
1943 | ||
4534de83 | 1944 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e JG |
1945 | { .cmd = OVS_VPORT_CMD_NEW, |
1946 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1947 | .policy = vport_policy, | |
1948 | .doit = ovs_vport_cmd_new | |
1949 | }, | |
1950 | { .cmd = OVS_VPORT_CMD_DEL, | |
1951 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1952 | .policy = vport_policy, | |
1953 | .doit = ovs_vport_cmd_del | |
1954 | }, | |
1955 | { .cmd = OVS_VPORT_CMD_GET, | |
1956 | .flags = 0, /* OK for unprivileged users. */ | |
1957 | .policy = vport_policy, | |
1958 | .doit = ovs_vport_cmd_get, | |
1959 | .dumpit = ovs_vport_cmd_dump | |
1960 | }, | |
1961 | { .cmd = OVS_VPORT_CMD_SET, | |
1962 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ | |
1963 | .policy = vport_policy, | |
1964 | .doit = ovs_vport_cmd_set, | |
1965 | }, | |
1966 | }; | |
1967 | ||
1968 | struct genl_family_and_ops { | |
1969 | struct genl_family *family; | |
4534de83 | 1970 | const struct genl_ops *ops; |
ccb1352e | 1971 | int n_ops; |
2a94fe48 | 1972 | const struct genl_multicast_group *group; |
ccb1352e JG |
1973 | }; |
1974 | ||
1975 | static const struct genl_family_and_ops dp_genl_families[] = { | |
1976 | { &dp_datapath_genl_family, | |
1977 | dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops), | |
1978 | &ovs_dp_datapath_multicast_group }, | |
1979 | { &dp_vport_genl_family, | |
1980 | dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops), | |
1981 | &ovs_dp_vport_multicast_group }, | |
1982 | { &dp_flow_genl_family, | |
1983 | dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops), | |
1984 | &ovs_dp_flow_multicast_group }, | |
1985 | { &dp_packet_genl_family, | |
1986 | dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops), | |
1987 | NULL }, | |
1988 | }; | |
1989 | ||
1990 | static void dp_unregister_genl(int n_families) | |
1991 | { | |
1992 | int i; | |
1993 | ||
1994 | for (i = 0; i < n_families; i++) | |
1995 | genl_unregister_family(dp_genl_families[i].family); | |
1996 | } | |
1997 | ||
1998 | static int dp_register_genl(void) | |
1999 | { | |
2000 | int n_registered; | |
2001 | int err; | |
2002 | int i; | |
2003 | ||
2004 | n_registered = 0; | |
2005 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
2006 | const struct genl_family_and_ops *f = &dp_genl_families[i]; | |
2007 | ||
c53ed742 JB |
2008 | f->family->ops = f->ops; |
2009 | f->family->n_ops = f->n_ops; | |
2a94fe48 JB |
2010 | f->family->mcgrps = f->group; |
2011 | f->family->n_mcgrps = f->group ? 1 : 0; | |
c53ed742 | 2012 | err = genl_register_family(f->family); |
ccb1352e JG |
2013 | if (err) |
2014 | goto error; | |
2015 | n_registered++; | |
ccb1352e JG |
2016 | } |
2017 | ||
2018 | return 0; | |
2019 | ||
2020 | error: | |
2021 | dp_unregister_genl(n_registered); | |
2022 | return err; | |
2023 | } | |
2024 | ||
46df7b81 PS |
2025 | static int __net_init ovs_init_net(struct net *net) |
2026 | { | |
2027 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2028 | ||
2029 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2030 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
46df7b81 PS |
2031 | return 0; |
2032 | } | |
2033 | ||
2034 | static void __net_exit ovs_exit_net(struct net *net) | |
2035 | { | |
46df7b81 | 2036 | struct datapath *dp, *dp_next; |
8e4e1713 | 2037 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
46df7b81 | 2038 | |
8e4e1713 | 2039 | ovs_lock(); |
46df7b81 PS |
2040 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2041 | __dp_destroy(dp); | |
8e4e1713 PS |
2042 | ovs_unlock(); |
2043 | ||
2044 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
2045 | } |
2046 | ||
2047 | static struct pernet_operations ovs_net_ops = { | |
2048 | .init = ovs_init_net, | |
2049 | .exit = ovs_exit_net, | |
2050 | .id = &ovs_net_id, | |
2051 | .size = sizeof(struct ovs_net), | |
2052 | }; | |
2053 | ||
ccb1352e JG |
2054 | static int __init dp_init(void) |
2055 | { | |
ccb1352e JG |
2056 | int err; |
2057 | ||
3523b29b | 2058 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
ccb1352e JG |
2059 | |
2060 | pr_info("Open vSwitch switching datapath\n"); | |
2061 | ||
2062 | err = ovs_flow_init(); | |
2063 | if (err) | |
2064 | goto error; | |
2065 | ||
2066 | err = ovs_vport_init(); | |
2067 | if (err) | |
2068 | goto error_flow_exit; | |
2069 | ||
46df7b81 | 2070 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2071 | if (err) |
2072 | goto error_vport_exit; | |
2073 | ||
46df7b81 PS |
2074 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2075 | if (err) | |
2076 | goto error_netns_exit; | |
2077 | ||
ccb1352e JG |
2078 | err = dp_register_genl(); |
2079 | if (err < 0) | |
2080 | goto error_unreg_notifier; | |
2081 | ||
ccb1352e JG |
2082 | return 0; |
2083 | ||
2084 | error_unreg_notifier: | |
2085 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2086 | error_netns_exit: |
2087 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2088 | error_vport_exit: |
2089 | ovs_vport_exit(); | |
2090 | error_flow_exit: | |
2091 | ovs_flow_exit(); | |
2092 | error: | |
2093 | return err; | |
2094 | } | |
2095 | ||
2096 | static void dp_cleanup(void) | |
2097 | { | |
ccb1352e JG |
2098 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
2099 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2100 | unregister_pernet_device(&ovs_net_ops); |
2101 | rcu_barrier(); | |
ccb1352e JG |
2102 | ovs_vport_exit(); |
2103 | ovs_flow_exit(); | |
2104 | } | |
2105 | ||
2106 | module_init(dp_init); | |
2107 | module_exit(dp_cleanup); | |
2108 | ||
2109 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2110 | MODULE_LICENSE("GPL"); |